Answer:
1. a.mutation,
b. recombination,
c. immigration of genes,
d.climate and
e.associations
2. Mutation : Is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
Gene flow : Gene flow is also called gene migration. Gene flow is the transfer of genetic material from one population to another. Gene flow can take place between two populations of the same species through migration, and is mediated by reproduction and vertical gene transfer from parent to offspring.Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).Genetic Recombination : Is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms.
3. The 3 Types of Natural Selection
Stabilizing Selection.Directional Selection.Disruptive Selection.Stabilizing selection : Stabilizing selection is a type of natural selection in which the population mean stabilizes on a particular non-extreme trait value. This is thought to be the most common mechanism of action for natural selection because most traits do not appear to change drastically over time. Directional Selection: In population genetics, directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.Disruptive selection : Disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.What happens to the carbon dioxide (CO2) levels of a plant when it does or does not have light?
Explanation:
Carbon dioxide is needed for photosynthesis, but oxygen is needed for cellular respiration. Assuming there is still oxygen then the plants will produce carbon dioxide and some of it will be reabsorbed by photosynthesis during daylight. However, ultimately there wouldn’t be enough carbon dioxide for the plants to grow and they will start to die. Some plants have evolved a C4C4 photosynthesis pathway so they only require a small amount of CO2CO2 to survive, however they do still require more than zero CO2CO2.
So basically you killed off all the plants and all the other non-microbial life died of starvation shortly afterward.
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Plants and animals living together in an area make up a:
A. food
B. food chain
C. community
D. habitat
A species of rodent can either have brown fur or white fur. Brown fur is recessive and white fur is dominant. Which of the following would cause the rodent population to not be in Hardy-Weinberg Equilibrium? (5 points).
Brown fur alloys rodents to hide more easiy
Write tur attracts mates better
Roderis cannot leave or enter their habitat
The rodents male randomly
The rodents mulate a new allele for gray fiain
Answer:
brown fur because alloys rodebts to hide more easily
The diagram above shows a right lateral view of a male testicle. Where would immature sperm cells be produced? (2 points)
A
B
C
D
Explanation:
D which is the seminiferous tubules is where sperms are produced
Immature sperm cells are produced in testes' seminiferous tubules through spermatogenesis before becoming mature sperm cells, the correct option is D.
Immature sperm cells, also known as spermatids, are produced in the seminiferous tubules within the testes. The testes are male reproductive organs located in the scrotum, below the pe-nis. The process of sperm production is called spermatogenesis, and it involves the division and differentiation of germ cells within the seminiferous tubules. Initially, spermatogonia (immature germ cells) undergo mitosis to form primary spermatocytes.
These primary spermatocytes then undergo meiosis to produce secondary spermatocytes, and finally, these secondary spermatocytes develop into spermatids. The spermatids will then undergo further maturation and structural changes to become mature sperm cells, which are eventually released into the male reproductive tract during ejaculation for potential fertilization, the correct option is D.
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How do joints compare to sutures in the skull? A. Both are made of the hardest substance in the body B. Both are made of cartilage C. Both can move D. Both cover the top and back of the skull
Answer:
D. Both cover the top and back of the skull
Explanation:
We can cross out A. because sutures are soft. Along with A. we can cross out B. C. is also incorrect because joints cannot move. Your answer is D.
Hope this helps!
Camels have adapted to the harsh environment of the desert and can go for days without
and
(Choose the two correct answers)
water
sleep
shade
oxygen
food
Answer:
water
Explanation:
that's why they got himps on they back
The human heart is divided into ? Chambers
Answer:
four chambers
Explanation:
two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
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A virus has entered the blood vessels of the nose. Where would the virus first encounter the defenses of the lymphatic system? (2 points)
In the tonsils, which are located at the back of the throat
In the tonsils, which are located in the chest
In the thymus, which is located at the back of the throat
In the thymus, which is located in the chest
Answer:
I think A
Explanation:
The Tonsils are the only ones at the back of the throat, and that is where a virus will be encountered first, also, When you get a cold or something, the sore throat is one if the first symptoms, meaning that the body is fighting that virus
Answer: A, In the tonsils, which are located at the back of the throat
Explanation:
What is draco named for?
Answer:
Dragon
Explanation:
Draco's name comes from the Latin for the dragon, and Draco is also another constellation named by astronomer Ptolemy.
what is the function of jacobson's organ of snake?
Answer:
The Jacobson's organ is useful in the progress of communicating chemical
message, such as readiness for ______ activity, between members of the same species. The organ helps hunt and attack their prey
Explanation:
Your friends check a website to determine if tomorrow will be a good day to go to a beach. What
type of forecast are they looking at?
rie
ecifi
O A. Weather
O B. Global
O C. Climate
O D. Coriolis
Many bacterial species live in the human gut without causing disease assisting in digestion and other functions how could these bacteria be categorized
A. These bacteria are symbionts
B. These bacteria are pathogens
C. These bacteria are parasites
D. These bacteria are vectors
Answer:
I think the answer is A
I could be wrong
List one way in which manganese dioxide and catalase are different.
Manganese dioxide and catalase are different because manganese dioxide is an inorganic catalyst. Conversely, catalase is an organic enzyme.
What is an enzyme?An enzyme is an organic catalyst (i.e., a protein) that acts to speed up a chemical reaction by lowering its activation energy.
Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide (H2O2) into oxygen (O2) and water (H2O).
Manganese dioxide also catalyzes the decomposition of H2O2 to oxygen and water, but it is an inorganic compound.
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5th grade pls help!
5. Metals and nonmetals are both good conductors.
This statement is (true or false) because ____ .
Answer:
False
answer is FALSE. Metals are usually good conductors, while nonmetals are not usually good conductors.
Explanation:
hope it helps
Enzymes increase the rate of reactions. Pick the right answer:
1. The enzymes increase the rate of the reaction due to the changes they themselves undergo.
2. Enzymes repeat their action again and again to accelerate activity.
3. Enzymes increase the activation energy of the reaction.
4. Enzymes alter the activity profile of the substrate.
(I hope it makes sense. I had to translate it from my native language. Help is much appreciated!).
Answer:
Enzymes increace the rate of reaction due to the changes they themselves undergo
How can a magnetic field be strengthened in a wire? (1 point)
O by insulating the wire
O by heating the wire
O by coiling the wire
O by straightening the wire
What is scientific experiment?
Answer:
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated.
What part does the ocean play in the water cycle?
Answer:
Oceans are important for ivaporation of the water cycle.
Explanation:
Oceans are important to the water cycle because most of Earth's surface is ocean water, and the oceans provide most of the water vapor. The water cycle is the process which water leaves the Earth's surface, enters the atmosphere, and is returned to the surface.
Hope this helps!
Which type of white blood cell is activated by antigens that are bound to antibodies?
Answer:
Antibodies are produced by specialized white blood cells called B lymphocytes (or B cells). When an antigen binds to the B-cell surface, it stimulates the B cell to divide and mature into a group of identical cells called a clone.
Explanation:
A doctors patients complain less about their acid reflux symptoms after taking Prilosec for 4 weeks. What is the dependent variable
Answer:
patients complain about acid reflux
Explanation:
independent variable is the variable that "I" control
dependent is the variable that is being measured.
what is vertebral column?
(ver-TEE-brul KAH-lum) The bones, muscles, tendons, and other tissues that reach from the base of the skull to the tailbone. The vertebral column encloses the spinal cord and the fluid surrounding the spinal cord. Also called backbone, spinal column, and spine. Enlarge
What is the final stage of ecological succession?
A. only small, slow-growing plants
B. mosses and lichens
C. grasses only
D. variety of mature plants and trees
Answer:
D. variety of mature plants and trees
Explanation:
because climax, ecology, the final stage of biotic succession attainable by a plant community in an area under the environmental conditions present at a particular time.
What do tumor SUPRESSOR genes do?
cause tumors to grow quicker
encourages tumor growth
stop a tumor from growing
all of the above
Answer:
Stops a tumor from growing
Explanation:
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Re word this myth : a dead organism is the same as a nonliving thing in science
Answer:
Myth: A dead organism is the same as a nonliving thing in science.
Fact: A non-living thing can be very different than a living thing.
Explanation:Evidence: Once- living things are made up different things then non-living things. While a rock is a nonliving thing, it doesn't contain the same build as living things. If we were to look at a dead once living being, we could probably conclude that it was a living thing since it contains things like cells, proteins, etc. That other thing, like dirt, wouldn't have.
1. Do you think that the Cuscuta shown in the image has chloroplasts and engages in photosynthesis?
Photosynthesis usually occurs in green plants' chloroplasts .So just observe that you can find as no images attached
Photosynthesis is a process used by green plants to produce carbohydrates from water and carbon dioxidewhat property of water allows an animal to release excess heat in hot environments
Water is an excellent conductor of heat for which animals may control temperature through transpiration and thus maintain a suitable body temperature.
How does transpiration help animals to control body temperature?The process of transpiration helps animals control body temperature by relating water which serves to conduct the heat and dissipate it into the surrounding environment to decrease the body temperature.
Therefore, with this data, we can see that transpiration helps animals control body temperature by increasing heat conductivity and thus removing the excess heat from the body.
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Which process takes CO2 out of the atmosphere
Answer:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen.
Explanation:
Photosynthesis removes CO2 from the atmosphere and replaces it with oxygen. By respiration, O2 is removed from the atmosphere and replaced with CO2. However, these processes are not balanced. Some organic matter is not oxidized. (I'm very sorry if I'm wrong but I believe it's that)
The process that takes CO2 out of the atmosphere is Photosynthesis because photosynthesis removes all the CO2 from out the atmosphere and it is replacing the CO2 with O2. When we breathe we take O2 from the atmosphere and replaces it with CO2.
Define homeostasis and its adaptive advantage
2. Describe the components involved in the homeostasis mechanism
3. Explain how each component works using a named example
4. Explain how the negative feedback mechanism will work to bring the body back to a stable state after a disruption
Please, I need a full explanation for all of these questions.
Humans can maintain stable internal temperature by
Answer:Our internal body temperature is regulated by a part of our brain called the hypothalamus. The hypothalamus checks our current temperature and compares it with the normal temperature of about 37°C. If our temperature is too low, the hypothalamus makes sure that the body generates and maintains heat.
Explanation:brainliest?
Answer:
Thermoregulation
Explanation:
We have a mechanism called Thermoregulation, where we maintain our body temperature with tightly controlled self-regulation thats independent of external temperatures.
I need help with this s question
Answer:
b
Explanation:
